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US 2006/0050228 A1Published application
Method for stabilizing refractive index profiles using polymer mixtures
OwnerShui Lai, Donald Bruns +2inventors
InventorsShui Lai, Donald Bruns, Lawrence Sverdrup, Gomaa Abdel-Sadek
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Abstract
A method for making an optical element comprises polymerizing a first monomer to form a first polymer, the first polymer having a spatially varying degree of cure that provides a predetermined refractive index profile; and polymerizing a second monomer in the presence of the first polymer to form a second polymer intermixed with the first polymer, the second polymer stabilizing the first polymer and the refractive index profile.
Claims20
An optical element comprising:
- a first optical cover, a second optical cover, and a layer of polymeric material sandwiched between the first optical cover and the second optical cover;
- wherein the polymeric material comprises a mixture of a first polymer and a second polymer, the first polymer having a spatially varying degree of cure that provides a predetermined refractive index profile, and the second polymer being cured to thereby stabilize the refractive index profile.
A method for making an optical element, comprising:
- polymerizing a first monomer to form a first polymer, the first polymer having a spatially varying degree of cure that provides a predetermined refractive index profile;
- and
- polymerizing a second monomer in the presence of the first polymer to form a second polymer intermixed with the first polymer, the second polymer stabilizing the refractive index profile.
A method for making an ophthalmic lens, comprising:
- forming a mixture comprising a first monomer, a second monomer, a first photoinitiator, and a second photoinitiator;
- placing the mixture between a first optical cover and a second optical cover;
- exposing the mixture to a first radiation source, thereby polymerizing the first monomer to form a first polymer, the first polymer having a spatially varying degree of cure that provides a predetermined refractive index profile;
- and
- exposing the second monomer to a second radiation source, thereby polymerizing the second monomer to form a second polymer intermixed with the first polymer.
2 more elements
Dependencies are inferred from the claim text.